Ecox EIHPTC, Installation Manual, Page: 11 / 18

11
EIHPTC
CEILING FLOOR TYPE
Connect the indoor unit at first, then the outdoor unit.
Bend the tubing in proper way. Do not harm to them.
The bending angle should not exceed 90.
Bending position is preferably in the middle of the bendable
pipe. The larger the bending radius the better it is.
Do not bend the pipe more than three times.
When connecting the flare nut, coat the flare both inside and
outside with either oil or ester oil and initially tighten by hand 3
or 4 turns before tighting firmly.
Be sure to use both a spanner and torque wrench together
when connecting or disconnecting pipes to /from the unit.
4
Bend the pipe with thumb
min-radius 100mm
Fig.7-4
Fig.7-5
Fig.7-6
CAUTION
Too large torque will harm the bellmouthing and too small will
cause leakage. Please determine the torque according to Table 7-2.
After the connecting work is finished, be sure to check that there
is no gas leak.
How to expel the air with a vacuum pump
Stop valve operation introduction
Opening stop valve.
Remove the cap and turn the valve counter clock-wise with the
hexagon wrench.
Turn it until the shaft stops.Do not apply excessive force to the
stop valve. Doing so may break the valve body, as the valve is
not a backseat type. Always use the special tool.
Make sure to tighten the cap securely.
Closing stop valve
Remove the cap and turn the valve clockwise with the hexagon
wrench.
Securely tighten the valve until the shaft contacts the main
bodyseal.
1
1.
2.
3.
2
1.
Make sure to tighten the cap securely.
For the tightening torque, refer to the table below.
CAUTION
Always use a charge hose for service port connection After
tightening the cap, check that no refrigerant leaks arepresent.
Fig.7-7
service port
cap
maintenance nut
hexagon hole shaft seal
1
Using the vacuum pump
Loosen and remove the maintenance nuts of stop valves A and
B, and connect the charge hose of the manifold valve to the
service port of stop valve A. (Be sure that stop valves A and B
are both closed)
Connect the joint of the charge hose with the vacuum pump.
Open the Lo-lever of the manifold value completely.
Turn on the vacuum pump. At the beginning of pumping,
loosen the maintenance nut of stop valve B a little to check
whether the air comes in (the sound of the pump changes,
and the indicator of compound meter turns below zero). Then
fasten the maintenace nut.
When the pumping has finished, close the Lo-lever of the
manifold valve completely and turn off the vacuum pump.Make
pumping for 15 minutes or more and check that the compound
meter indicates -76cmHg(-1X10
5
Pa)
Loosen and remove the cap of stop valves A and B to open stop
valve A and B completely, then fasten the cap.
Disassemble the charge hose from the service port of stop
valve A, and fasten the nut.
2
3
4
5
6
7
Table 7-3
Tightening torque N M (Turn clockwise to close)
Stop
Valve size
Shaft (valve body)
Cap
(Valve lid)
Ø6.35
Hexagonal
wrench 4 mm
Ø9.52
Ø12.7
Ø15.9
Hexagonal
wrench 6 mm
Hexagonal
wrench 6 mm
Ø19
Maintenance nut
35 40
23 27
18 22
13.5 16.5 5 7
7 9
9 11
11 13
11.5 13.9
2.
Fig.7-8
Stop valve
Gas side
Liquid side
Outdoor
unit
Indoor
unit
A
C
D
B
3